heres a few clues.. as to why i can see in tath pic it;s not an 87..
there is NO reedbox
the big square area for the powervalve is not there..
the last 3 could be swapped from an 85-86 to an 87
it has the 4X130 rear hubs ..87-92 have 5X130 rear hubs 85-86 and 87 share teh 2 spline axle so teh 4X130 hubs could swap onto an 87... but ONLY an 87...
that has the straight 85-86 style seat.. 87-92 have a T shaped seat.. the seat swap from any year to any other year..
the hood is black.. 85-86 has black hoods.. 87-92 had blue hoods.. but all year hoods can swap back adn forth as well..
but that is definatley an 85 or 86